[+][+] Leaves divided to the base, uppermost and lowest sometimes simple.
9. C. senifòlia, Michx. Plant minutely soft-pubescent; leaves each divided into 3 sessile ovate-lanceolate entire leaflets, therefore appearing like 6 in a whorl.—Sandy woods, Va. and southward. July.
Var. stellàta, Torr. & Gray. Glabrous, and the leaves narrower.—Va., Ky., and southward.
10. C. delphinifòlia, Lam. Glabrous or nearly so; leaves divided into 3 sessile leaflets which are 2–5-parted, their divisions lance-linear (1–3´´ broad), rather rigid; disk brownish.—Pine woods, Va. and southward. July.
11. C. verticillàta, L. Glabrous; leaves divided into 3 sessile leaflets which are 1–2-pinnately parted into narrowly linear or filiform divisions.—Damp soil, from Ont. and Mich. to Md., Ark., and southward. Cultivated in old gardens, but not showy. July–Sept.
[*][*] Outer scales narrow, shorter, all united at base; rays entire, obtuse; pappus none; leaves petiolate, pinnately 3–5-divided; perennial.
12. C. trípteris, L. (Tall Coreopsis.) Smooth; stem simple (4–9° high), corymbed at the top; leaflets lanceolate, acute, entire.—Penn. to Wisc., Iowa, and southward. Aug.–Sept.—Heads exhaling the odor of anise when bruised; disk turning brownish.
[*][*][*] Scales mostly distinct, the outer leafy, reflexed or spreading; achenes flat, obovate or cuneate-oblong, 1-nerved on each face, 2-toothed or 2-awned (rarely 4-awned); leaves petiolate, usually pinnately 3–7-divided, the lobes serrate; annuals (or biennial), branching. Approaching Bidens.
[+] Rays conspicuous, golden yellow.
[++] Achenes cuneate, obscurely ciliate or naked; outer scales about 8.